#dynamicDiv{
    width: 50%;
    height: 600px;
    margin: 0 auto;
    /*background-color: lightseagreen;*/
}
/*#editMine{*/
/*    width: 10%;*/
/*    height: 5%;*/
/*    background-color: rosybrown;*/
/*    float: left;*/
/*}*/
.dy_item{
    width: 100%;
    height: 50%;
    border-bottom: royalblue 1px solid;
}
.avatar_div{
    width: 15%;
    height: 100%;
    /*background-color: red;*/
    float: left;
}
.main_div{
    width: 85%;
    height: 100%;
    padding-left: 10px;
    /*background-color: #fd7e14;*/
    float: left;
}
.nickname_div{
    width: 100%;
    height: 40px;
    font-size: 20px;
    font-weight: bold;
    /*background-color: greenyellow;*/
}
.content_div{
    width: 100%;
    height: 20%;
    /*background-color: #efa2a9;*/
}
.image_div{
    width: 100%;
    height: 50%;
    /*background-color: forestgreen;*/
}
.message_div{
    width: 100%;
    height: auto;
    background-color: lightgrey;
    position: relative;
    /*相对于它在文档流中的位置*/
    /*bottom: -100px;*/
    /*!*bottom: -10%;*!*/
}
.avatar_img{
    width: 100%;
    border-radius: 5px;
}